code: def cm_fn_tuple():
      return _CustomArtifact(lambda: None, "", 0, "")
  
file_path: mlflow/tests/models/test_artifacts.py
imports: import json
  import pathlib
  import matplotlib.pyplot
  import numpy
  import pandas
  import pytest
  from mlflow.exceptions import MlflowException
  from mlflow.models.evaluation.artifacts import CsvEvaluationArtifact, ImageEvaluationArtifact, JsonEvaluationArtifact, NumpyEvaluationArtifact, ParquetEvaluationArtifact, PickleEvaluationArtifact, TextEvaluationArtifact, _infer_artifact_type_and_ext
  from mlflow.models.evaluation.default_evaluator import _CustomArtifact
label_desc: Use image node_id 1 for calling a global function with example usage: cm_fn_tuple() and returns: _CustomArtifact